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Murder Laws in Wyoming

How Wyoming law treats murder (first vs second degree): what is illegal, whether it is a misdemeanor or felony, and the penalties, from the state code.

Short answer: First-degree murder is killing purposely and with premeditated malice, or killing anyone while committing or attempting sexual assault, sexual abuse of a minor, arson, robbery, burglary, escape, resisting arrest, kidnapping or abuse of a child under 16 (felony murder). W.S. 6-2-101, 6-2-104, 6-2-109

Murder (first vs second degree)First-degree murder is killing purposely and with premeditated malice, or killing anyone while committing or attempting sexual assault, sexual abuse of a minor, arson, robbery, burglary, escape, resisting arrest, kidnapping or abuse of a child under 16 (felony murder). It is punished by death, life without parole, or life imprisonment 'according to law'; a defendant under 18 at the time can receive only life imprisonment, and the judge chooses between the two life sentences unless the state seeks death. Second-degree murder, killing purposely and maliciously but without premeditation, carries 20 years to life (at least 40 years to life if the defendant knew the victim was pregnant). Wyoming has no third-degree murder.
Read in the official Title 6 PDF published by the Wyoming Legislature.

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FAQ

What is the difference between first and second degree murder in Wyoming?
First-degree murder is killing purposely and with premeditated malice, or killing anyone while committing or attempting sexual assault, sexual abuse of a minor, arson, robbery, burglary, escape, resisting arrest, kidnapping or abuse of a child under 16 (felony murder). It is punished by death, life without parole, or life imprisonment 'according to law'; a defendant under 18 at the time can receive only life imprisonment, and the judge chooses between the two life sentences unless the state seeks death. Second-degree murder, killing purposely and maliciously but without premeditation, carries 20 years to life (at least 40 years to life if the defendant knew the victim was pregnant). Wyoming has no third-degree murder.
Can I get a court-appointed lawyer for murder (first vs second degree) in Wyoming?
Wyoming's rule on court-appointed lawyers: The public defender represents any needy person under arrest for or formally charged with a serious crime (any felony, or a misdemeanor for which incarceration is a practical possibility, plus misdemeanor crimes of domestic violence) if the defendant requests counsel or the court orders appointment. At the initial appearance the court advises a needy defendant of the right to an attorney at public expense and of the possibility of being ordered to reimburse the state. Need is determined by the court on a separate written application for each proceeding. A person whose annual gross income is less than 125% of the current federal poverty level for the immediate family unit is needy; between 125% and 218% may be deemed needy; above 218% shall not be deemed needy (though a felony defendant may be found needy in extraordinary circumstances). A person is presumed needy if receiving TANF, EAEDC, poverty-related veterans benefits, SNAP, Medicaid or SSI, or if in a public mental health facility, state prison or county jail with no available funds or liquid assets. Release on bail does not necessarily prevent a finding of need. The court must determine whether the person can reimburse any of the costs and may order reimbursement under the state public defender's standard fee schedule. W.S. 7-6-102(a)(iv)-(v), 7-6-104, 7-6-105, 7-6-106
How much does a lawyer for murder (first vs second degree) cost in Wyoming?
Lawyers set their own fees, and Wyoming has rules on how they may charge. See hiring a criminal defense lawyer in Wyoming for fee rules, how to check a lawyer's license and free help.
What happens after an arrest for murder (first vs second degree) in Wyoming?
How release before trial works in Wyoming: A person arrested for an offense not punishable by death may be admitted to bail. For an offense punishable by death, bail is at the discretion of the authorized judicial officer, except that the defendant shall not be admitted to bail if the proof is evident or the presumption great. Wyoming Supreme Court rules govern the terms, amount and conditions of bail. Under Rule 46.1, all persons shall be bailable by sufficient sureties, except for capital cases when the proof is evident or the presumption great, and excessive bail shall not be required; a judicial officer orders the person released or detained pending proceedings. Within four hours after a person is confined to jail, the custodial officer shall advise the person of the right to file a written request with the court for pretrial release and provide writing materials; no particular form of request is required and it may be handwritten. W.S. 7-10-101, 7-10-102; Wyo. R. Crim. P. 46.1(a) (as amended effective July 1, 2019) What happens after an arrest.
Can a conviction for murder (first vs second degree) be removed from my record in Wyoming?
Each state sets its own rules for sealing or expunging records. See Wyoming expungement and record sealing rules.

General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.